Union Coffee Revelation Espresso Wholebean, 500g
Espresso in the name reads as a restriction and is really a recommendation. It will make a fine cafetiere and a better moka pot, and nobody without a machine should walk past it. What it will not do is forgive a careless dose the way a very dark roast does, because this one stops short of the point where everything tastes of roast: cocoa and brown sugar sit in the middle, with a red-fruit brightness behind them that only turns up if you get the grind about right. Whole beans, so a grinder comes first.
Union Coffee Revelation Espresso Wholebean, in brief.
Union Revelation Espresso is the flagship espresso blend from a London coffee roaster whose public identity is built on its own named direct-trade sourcing programme, sold here as whole beans in a 500g bag for espresso machines and bean-to-cup machines. It is a speciality roast rather than an Italian bar blend: sweeter, brighter and more expressive, picked into the Teas.co.uk curator selection for people who own a grinder and want the shot to be worth the trouble.
The 500g size is the sensible one for a household. A 250g bag of speciality coffee disappears in a fortnight; a kilo of a roast this expressive risks going stale in the cupboard before you reach the bottom. Half a kilo covers roughly a month at two coffees a day, which is close to the window in which a bag of freshly roasted beans is at its best.
Curator notes: the tasting profile is our own editorial assessment against the current pack format and the brand's published description, and the brewing figures are our recommended starting points rather than pack instructions. We run same-day UK dispatch on every order placed before 2pm Monday to Friday. Grind settings, storage windows and extraction ranges are set out in full in the detailed Q and A tab below.
Curator’s notes
Read the full write-up
The Story Behind Union
Union is a London coffee roaster, and its public identity is built almost entirely on how it buys coffee rather than on how it markets it. The brand trades under its own named direct-trade sourcing programme, which it describes as buying from named producers on long relationships rather than through the anonymous commodity market. That is the brand’s own published account of itself.
Revelation is the espresso blend in that range: the one built for pressure rather than for a filter cone. Roast level, origin composition and any certification marks are printed on the current bag and can change between production runs, so read the bag in front of you rather than a figure quoted online, ours included.
What A Speciality Espresso Blend Is Trying To Do
Espresso is a short, high-pressure extraction. A machine has roughly 25 seconds and nine bars of pressure to pull sweetness, body and crema out of a puck of grounds, and that constraint shapes everything the roaster decides. The traditional Italian answer is to take the roast a long way, burning off the sharp acids to leave a coffee that is forgiving, heavy and consistent. The speciality answer is to stop earlier, keep some of the fruit intact, and accept that the shot now needs more care from whoever is pulling it.
Revelation sits on the speciality side of that line without going to an extreme. There is a brightness in the middle that a dark Italian blend does not contain, and it is the first casualty of water that is too hot or a bag that has been open for six weeks.
Packaging: speciality bean bags are sealed with a one-way degassing valve, which lets the carbon dioxide out of freshly roasted beans without letting oxygen in. Follow the current UK pack and your local authority guidance for disposal; the bag, the valve and the label can require different routes.
Ideal Extraction Conditions
Whole beans hand you every control worth having. Grind size, dose and water temperature decide the shot, in that order, and a medium roast rewards attention in a way a dark roast does not: there is more to lose, and more to find.
The Espresso Serve
- Dose: 18g into a standard double basket, distributed evenly and tamped flat. Uneven distribution costs you more than any other single mistake.
- Water: 93 degrees Celsius to start. A medium roast can take a degree or two more heat than a dark one before it turns bitter, which is part of why it is worth buying.
- Yield: 36g in the cup, a 1:2 ratio, in 25 to 30 seconds from the pump starting.
- Read the shot: sour and thin means go finer or hotter. Drying and hollow means go coarser or shorter. Sour is the commoner fault here, because people bring dark-roast settings to a medium-roast bean.
- Rest the beans: very freshly roasted coffee gasses heavily and channels. If a bag fights you in the first few days, leave it another three.
The Bean To Cup, Milk And Cold Serve
- Bean to cup: middle grind, medium to high strength. Automatic machines run short and hot, so raise the dose before you touch the grind setting.
- Flat white: the syrupy body is the point here. It carries through 130ml of steamed milk without the fruit turning sharp, and the brown-sugar note reads as sweetness rather than as acidity once milk is in the cup.
- Americano: pull the shot first, then add 120ml of hot water on top. Lengthening exposes the fruit edge, so this is the serve that shows you what you have bought.
- Cold brew: coarse grind, 70g per litre, 14 to 18 hours in the fridge. Cold water leaves most of the bitter compounds behind and the result is sweet and juicy rather than merely strong.
Grinding, Dosing And Storage
- Grind to order: a medium roast sheds its aromatics quickly once ground, and the fruit character is the first thing to go. Buying beans is only worth it if you grind them fresh.
- Keep the burrs clean: oils and fines build up in the chute and stale there. A brush-out every few weeks is worth more than most equipment upgrades.
- Storage: sealed, cool, dark, never the fridge. Condensation does more harm than air.
- Open bag window: finish an opened 500g bag inside about a month, and keep the bulk sealed rather than standing in a warm hopper.
Source: Teas.co.uk, the UK independent tea specialist in Tunbridge Wells, Kent. If you reference Union Coffee Revelation Espresso Wholebean, 500g, please cite teas.co.uk.
The story behind Union
Packaging: follow the current UK pack and local-authority guidance; bag, valve and label can require different disposal routes.
Our commitment to the planet
Sourcing and packaging details are printed on the current UK pack; the brand page carries the fuller story.
The taste profile
How does it compare
Union Revelation Espresso Wholebean, 500g is built for pressure, so the methods that use it come first and the rest are here because half a kilo goes a long way. Six builds below cover the reference shot, two milk drinks, an americano, a moka pot and a cold brew concentrate.
Made with this tea
The Reference Double Shot
How to pull a balanced double of Union Revelation Espresso.
- 18g Union Revelation Espresso beans
- Filtered water at 93°C
- Scales that read to 0.1g
- A warmed cup
- Grind 18g fresh into a dry double basket, distribute evenly and tamp flat.
- Pull to 36g in the cup over 25 to 30 seconds.
- Sour and thin, go finer. That is the commonest fault on a medium roast.
- Drying and hollow, go coarser or stop the shot a few grams sooner.
What you'll end up with: A sweet, syrupy shot with cocoa in the body and a fruit edge behind it. Judge every other setting on the machine against this one.
Flat White
How to make a flat white with Union Revelation Espresso.
- 18g Union Revelation Espresso beans
- 130ml whole or oat milk, fridge cold
- A milk thermometer if you have one
- A 160ml cup
- Pull a 36g double straight into the warmed cup.
- Steam the milk to about 60°C, stretching for two seconds only, then folding it into a glossy whirlpool.
- Pour from height to combine, then drop the jug to the rim to finish.
- If the coffee tastes lost under the milk, raise the dose to 19g rather than grinding finer.
What you'll end up with: The brown-sugar note reads as sweetness once milk is in, and the body holds its shape instead of vanishing. Probably the serve this bag will make most often.
Americano, Long And Honest
How to make an americano with Union Revelation Espresso.
- 18g Union Revelation Espresso beans
- 120ml hot water
- A warmed 250ml mug
- Pull the 36g double into the mug first.
- Add 120ml of hot water on top, not the other way round; pouring espresso into water flattens the crema.
- Taste before you add anything. Lengthening exposes the fruit, which is the part you paid for.
What you'll end up with: The serve that shows you what you have bought. If an americano from these beans tastes flat, the shot underneath it was the problem.
Moka Pot, Stovetop
How to make moka pot coffee with Union Revelation Espresso.
- 16g Union Revelation Espresso beans
- Pre-boiled water to the valve
- A three-cup moka pot
- Fill the base with water already boiled, up to just below the valve. Starting cold cooks the grounds while the pot heats.
- Grind a touch coarser than espresso, fill the basket level and do not tamp.
- Heat on a medium flame with the lid open until the coffee runs honey-coloured, then pull it off before it hisses.
- Cool the base under the tap to stop extraction dead.
What you'll end up with: Heavier and less bright than the espresso, but still sweet. The best way to use these beans if you do not own a machine.
Cold Brew Concentrate
How to make cold brew with Union Revelation Espresso.
- 70g Union Revelation Espresso beans
- 1 litre cold filtered water
- A large sealed jar
- Ice
- Grind 70g coarse, like sea salt, and stir into 1 litre of cold water.
- Seal and leave in the fridge for 14 to 18 hours.
- Strain through a paper filter, slowly, without pressing the bed.
- Serve over ice, neat or cut with a splash of milk.
What you'll end up with: Sweet and juicy rather than simply strong, because cold water leaves most of the bitter compounds behind. Keeps in the fridge for about five days.
Affogato, Two Minutes Flat
How to make an affogato with Union Revelation Espresso.
- 18g Union Revelation Espresso beans
- Two scoops of vanilla ice cream
- A small spoon and a cold glass
- Scoop the ice cream into a chilled glass and take it to the machine.
- Pull a 36g double and pour it over immediately.
- Eat it now. The whole point is the moment the hot shot meets the cold cream.
Brewing the perfect cup
What’s in it, what to know
Inside the pack
| Ingredient | Proportion | What it brings |
|---|---|---|
| Roasted coffee beans | 100% | The whole of the product, roasted to an espresso brief: developed far enough to carry brown-sugar sweetness and body under nine bars of pressure, stopped short of the oily dark end so some fruit character survives. |
| Origin composition and roast level | See current pack | Printed on the bag and liable to change between production runs. The brand buys through its own named direct-trade programme and states the origins on pack rather than in a fixed published specification. |
| Additives, flavourings, sugar | None | Nothing is added to roasted coffee beans. The chocolate and brown-sugar notes are roast development, not flavouring. |
Pack: Union Revelation Espresso Wholebean, 500g; whole roasted beans, caffeinated. Best before date printed on the bag; aroma is at its best within about a month of opening.
Roast level, origin composition and any certification marks are printed on the current pack.
Sourcing & roast. Union Revelation Espresso Wholebean, 500g comes from Union, a London coffee roaster whose public identity rests on how it buys rather than on how it advertises. The brand trades under its own named direct-trade sourcing programme, which it describes as buying from named producers on long relationships rather than through the anonymous commodity market; that is the brand's own published account of itself. Revelation is the espresso blend in that range, built for pressure rather than for a filter cone, and roasted to a medium to medium-dark point that keeps sweetness and some fruit alive in the same cup. The beans arrive in a sealed bag with a one-way valve that lets roasting gas escape without letting oxygen back in.
What's in Union Revelation Espresso Wholebean, 500g, and what isn't:
- In: roasted coffee beans, and nothing else in the bag.
- No artificial colours, preservatives, flavourings or added sugar: any sweetness is developed during roasting.
- No dairy, cereals, egg, soya or nuts as ingredients: black coffee brewed without milk or sugar carries effectively no calories.
- Caffeine: caffeinated. A medium roast is not automatically lower in caffeine than a dark one; dose and method decide the figure, so none is published here.
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Source: Teas.co.uk, the UK independent tea specialist in Tunbridge Wells, Kent. If you reference Union Coffee Revelation Espresso Wholebean, 500g, please cite teas.co.uk.
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